XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.23.1

Term Loans (Details) $ / shares in Units, $ in Thousands |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 23, 2022 USD ($) $ / shares | Aug. 19, 2022 USD ($) $ / shares | Aug. 01, 2022 USD ($) | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($)
Term Loans [Line Items] |  |  |  |  |
Debt discount |  |  |  | $ (361) | $ (12)
Accrued Paid-in-Kind Interest |  |  |  | 260 |
Petrichor Financing | Securities Purchase Agreements | Convertible Note Borrowings |  |  |  |  |
Term Loans [Line Items] |  |  |  |  |
Maximum borrowing capacity |  |  | $ 45,000 |  |
Remaining borrowing capacity |  |  |  | $ 20,000 |
Commitment fee percentage |  |  |  | 2.00% |
Debt issuance costs |  |  |  | $ 175 |
Debt discount |  |  |  | (314) |
Fair value warrants |  |  |  | $ 441 |
Cash interest accrual rate over Prime |  |  |  | 4.50% |
Accrual rate, PIK interest |  |  |  | 3.50% |
Accrued Paid-in-Kind Interest |  |  |  | $ 260 |
Petrichor Financing | Securities Purchase Agreements | First Closing Note |  |  |  |  |
Term Loans [Line Items] |  |  |  |  |
Borrowings, face amount |  | $ 5,000 |  |  |
Initial conversion price | $ / shares |  | $ 8.11 |  |  |
Premium over 5-day VWAP |  | 20.00% |  |  |
VWAP term |  | 5 days |  |  |
Petrichor Financing | Securities Purchase Agreements | Second Closing Note |  |  |  |  |
Term Loans [Line Items] |  |  |  |  |
Borrowings, face amount | $ 20,000 |  |  |  |
Initial conversion price | $ / shares | $ 7.89 |  |  |  |
Premium over 5-day VWAP | 20.00% |  |  |  |
VWAP term | 5 days |  |  |  |
Petrichor Financing | Securities Purchase Agreements | Subsequent Closing Notes |  |  |  |  |
Term Loans [Line Items] |  |  |  |  |
Borrowings, face amount |  |  |  | $ 10,000 |
Initial conversion price | $ / shares |  |  |  | $ 7.89 |
Exercise price of warrants issued | $ / shares |  |  |  | $ 8.11 |
Petrichor Financing | Securities Purchase Agreements | Subsequent Closing Notes | Minimum |  |  |  |  |
Term Loans [Line Items] |  |  |  |  |
Number of loan tranches for remaining borrowing capacity |  |  |  | 1 |
Petrichor Financing | Securities Purchase Agreements | First Closing Warrant |  |  |  |  |
Term Loans [Line Items] |  |  |  |  |
Commitment fees payable in warrants |  |  |  | 50.00% |
Common shares available through issuance of warrants | shares |  |  |  | 55,498 |
Petrichor Financing | Securities Purchase Agreements | Second Closing Warrant |  |  |  |  |
Term Loans [Line Items] |  |  |  |  |
Common shares available through issuance of warrants | shares |  |  |  | 55,498 |
Commitment fees payable in cash or warrants |  |  |  | 50.00% |
Exercise price of warrants issued | $ / shares |  |  |  | $ 8.11 |
Exercise term of warrants |  |  |  | 5 years |
Bridge Bank | Bridge Bank Term Loan |  |  |  |  |
Term Loans [Line Items] |  |  |  |  |
Repayment of term loan |  | $ 5,000 | $ 5,000 |  |

X
- Definition Annual rate for which payment in kind (PIK) interest accrues beginning on the funding date and through August 24, 2024. + References No definition available. + Details
Name: | fenc_AccrualRatePikInterest
Namespace Prefix: | fenc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Interest payable other than in cash for example by issuing additional debt securities. As a noncash item, it is added to net income when calculating cash provided by or used in operations using the indirect method. + References No definition available. + Details
Name: | fenc_AccruedPaidInKindInterest
Namespace Prefix: | fenc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Rate, added to the Prime interest rate, at which cash interest will accrue on outstanding principal. + References No definition available. + Details
Name: | fenc_CashInterestAccrualRateOverPrime
Namespace Prefix: | fenc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage commitment fee payable on the notes from the security purchase agreement. + References No definition available. + Details
Name: | fenc_CommitmentFeePercentage
Namespace Prefix: | fenc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of common shares available for purchase with the issuance of warrants in connection with commitment fees payable under the security purchase agreement. + References No definition available. + Details
Name: | fenc_CommonSharesAvailableThroughIssuanceOfWarrants
Namespace Prefix: | fenc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents number of tranches of loans. + References No definition available. + Details
Name: | fenc_DebtInstrumentNumberOfLoanTranches
Namespace Prefix: | fenc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Exercise Price Of Warrants Issued during the relevant period + References No definition available. + Details
Name: | fenc_ExercisePriceOfWarrantsIssued
Namespace Prefix: | fenc_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term from the grant date in which the holder of warrants has to exercise the option to purchase common shares, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | fenc_ExerciseTermOfWarrants
Namespace Prefix: | fenc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of the commitment fees payable in the form of cash payment or additional warrant issuances. + References No definition available. + Details
Name: | fenc_PercentageOfCommitmentFeesPayableInCashOrWarrants
Namespace Prefix: | fenc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of the commitment fees payable in the form of warrant issuances. + References No definition available. + Details
Name: | fenc_PercentageOfCommitmentFeesPayableInWarrants
Namespace Prefix: | fenc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage premium over the 5-day volume weighted average conversion price in debt agreement. + References No definition available. + Details
Name: | fenc_PremiumOverVolumeWeightedAverageConversionPricePercentage
Namespace Prefix: | fenc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term in which the volume weighted average price is determined in connection with new financing agreements, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | fenc_VolumeWeightedAveragePriceTerm
Namespace Prefix: | fenc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031898-161870 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 + Details
Name: | us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt discount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1D -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1D -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399 + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow to settle a bank borrowing during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfBankDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=fenc_PetrichorOpportunitiesFundIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=fenc_SecuritiesPurchaseAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=fenc_FirstClosingNoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=fenc_SecondClosingNoteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=fenc_SubsequentClosingNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=fenc_FirstClosingWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=fenc_SecondClosingWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=fenc_BridgeBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=fenc_BridgeBankTermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |